N-pcters



2 Sheets-Sheet 1. W. C. WREN, SteamlH-eater. No. 224,569. Patented Feb. 17, 1880.

N.P ErERs. PHOTO-LITHOGRAFHER, WASHINGTON, D. cA

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N4 PETERS. PHOTO LTHQGRAP wASmNGTcN D C UNITED STATES PATENT OFFICE.

WILLIAM C. WREN, OF BROOKLYN, NEW YORK.

STEAM-HEATER.

SPECIFICATION forming part of Letters. Patent No. 224,569, dated rebmary i7, isso.

Application filed December 20, 1879.

in eachof the figures of the accompanying drawings.

My invention relates to an apparatus designed to generate steam at a low pressure for heating buildings, and at the same time the apparatus will supply dry heat for heating la part of the same building.

Figure l is avertical section, through the center of the apparatus, on the line my, Fig. i

6. Figs. 2,3, 4t are vertical sections, on the line c te, of separate rings composing the interior of the apparatus, (marked, respectively, C, D, and K.) low lire-potring C, showing the piece in front taken out for the door. Fig. 6 is a plan View of one of the hollow rings D, showing the pipes S, by which the rings D are joined together. 'lhe pipe S can be made as shown, cast on the rings as parts thereof, one-halt' the length of the pipe required on each side ot" the ring, and the necessary length cast on the iire-pot ring C, and the same on the steamdruni E. The joints can be faced, or a nipple can be inserted, or an ordinary cup-and-socket joint can be used. Fig. 7 isa plan view of the rightangleringK,showing theholesR,through which the pipes S pass when the said rings are in position. Fig. 8 is a plan of the steamdrum E. Fig. 9 is an inverted plan of the steam-drum E. Fig. l0 is a plan view of the top ring, L, of the base. Fig. ll is an outside view of t-he apparatus complete, .Z being small doors for cleaning purposes.

Theyarious parts of the apparatus being put together, one piece on the top of the other, as shown by Fig. 1, so that the pipes S, as shown in Figs. 2, 3, and 9, shall be directly over one another and connecting with each other, and the right-angle` rings K in place,

Fig. 5 is a broken section ofthe holas shown, Fig. 1, the pipes will pass through the holes in the horizontal parts of the rings K, and the pipes S will form communications between the annular rings D, the annular tirepot ring C, and the steam'druni E. If the hollow rings D are. made as shown in the section Figs. 3 and l, with a flange, D2, extending from the same, then when all the rings are placed in position they will together form a vertical tube through the center of the heater, that can be used as a fuel-magazine.

When the last ring D that is required to complete the height of the boiler is put inposition the circular space in the center of the ring D must be closed by a cap, T', having an opening, u, to communicate with the feedpipe Gr.

The pipe G, Fig. l, extends through the steam-drum E and through the dome M2 ot' the external casing, M.

The outer casing rests on the top plate, L, of the base, which consists oi' said top plate, a bottom plate, Q, and annular plates ll P, the former inclosing the ash pit A below the grate B, and the latter having air-openings O, through which air can pass to the space N, between the vertical wall formed by the iianges of the rings K and the external casing, M.

The products of combustion passing upward from the tire-place flow through the chambers a; m, round the hollow projecting portions ot' the rings D, and in contact with the iianged rings K, heating both. The water in therings D is thus heated, the steam passing to the radiators. The flanged rings K maintain the heated gases in contact with the rings D, but also convey the heat to the airin the chamber N, thus a'ording a supply of heated air.

Suitable pipes lead from the steam-drum to the radiators. The chambers inclosed by the irepot ring C and the hollow rings D are to be tilled with water through Vsuitable inlet-pipes.

The heated air will take the course allaround the boiler indicated by the arrows in the space N, and can be conducted to suitable registers from the outlet T.

If it is not desirable to take the air from the place in which the apparatus is situated for the last-named purpose, and it is desirable to draw the fresh air from the outside,I then purI another casing around the ash-pit, which I IOO have marked U, as shown in Fig. l1 and seetion of same at Fig. l, said easing U having one or both inlets marked O.

When the air is brought from the outside of the course a suitable conductor must be eonneeted with the inlets O.

I elain1- 1. The hollow ringsD,eonstrueted with holloW external projections and annular iiauges, adapted to each other and combined in a furnace, as set forth.

2. The ilan'ged annular rings K, constructed and adapted to each other and combined in a set forth.

W. C. WREN. Witnesses:

L. SCHMIDT, JAS. ARMIN. 

